Cone-Shaped Supporting Structure for Direct-Type Backlight Module Shadow Suppression
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Solution Overview
Problem
Existing direct-type backlight modules suffer from dark shadows due to light obstruction by supporting structures and are prone to deformation under temperature changes or vibrations, leading to reduced quality and potential damage to LED light sources.
Innovation Solution
A direct-type backlight module design featuring a supporting structure with a cone-shaped body disposed on the light exit surface of an optical lens, which extends into a chamber to support a diffuser, optimizing the structure's height, curvature, and volume to minimize shadow formation and enhance structural strength, while being integrated with the optical lens for improved assembly efficiency and cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a supporting structure is added to prevent diffuser deformation, then structural stability is improved, but dark shadows are generated due to light obstruction
Solution Approach 1:
The supporting structure is designed with a cone-shaped (curved) geometry instead of a flat or angular shape. This curvature allows light rays to pass over the supporting structure more effectively, reducing the formation of dark shadows while maintaining the structural support function for the diffuser.
Solution Approach 2:
The supporting structure is positioned specifically at the rear portion of the backlight module where it is least visible to observers. By placing the support in this localized area, the shadowing effect is minimized in the visible display region while still providing necessary structural stability to the diffuser.
2Volume of moving object
If the chamber height is reduced for compact design, then device size is improved, but the supporting structure becomes more prone to deformation
Solution Approach 1:
The cone-shaped curved geometry of the supporting structure provides superior mechanical strength compared to flat structures of the same volume. The curved shape distributes stress more effectively, preventing deformation even when the chamber height is reduced for compactness.
Solution Approach 2:
The supporting structure is made from a transparent resin material that combines structural strength with optical transparency. This material selection allows the structure to maintain strength in a compact configuration while minimizing its visual impact and shadow formation.
3Quantity of substance
If a secondary lens is added to reduce LED quantity, then component count is improved, but device complexity increases
Solution Approach 1:
The supporting structure serves multiple functions simultaneously: it provides mechanical support for the diffuser, acts as a light guide to reduce shadowing, and functions as a structural element that defines the chamber geometry. This multi-functionality reduces the need for additional components like secondary lenses.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively suppresses dark shadow generation and prevents deformation of the supporting structure, ensuring consistent light distribution and maintaining structural integrity under varying temperatures and environmental conditions.
Implementation Method 1
an optical lens encapsulating the LED light source, the optical lens including a light entrance surface and a light exit surface for light rays emitted from the LED light source
Data Source
AI summary
A direct-type backlight module and a LED array are provided. The backlight module includes a supporting plate; a LED array, disposed on the supporting plate, the LED array including a LED light source; an optical lens encapsulating the LED light source, the optical lens including a light entrance surface and a light exit surface for light rays emitted from the LED light source; a light adjusting structure, disposed apart from the supporting plate, a chamber defined between the light adjusting structure and the supporting plate; and a supporting structure, disposed on the light exit surface of the optical lens, extending within the chamber toward the light adjusting structure along a direction away from the supporting plate, the supporting structure configured to support the light adjusting structure. Generation of dark shadows is suppressed and structural strength of the supporting structure is enhanced.